Usme_Formation

Usme Formation

Usme Formation

Geological formation in the Colombian Andes

For other uses, see Usme (disambiguation).

The Usme Formation (Spanish: Formación Usme, Tsu, Teu) is a geological formation of the Bogotá savanna, Altiplano Cundiboyacense, Eastern Ranges of the Colombian Andes. The formation consists of a lower part with predominantly shales with intercalated sandstone beds and an upper sequence with sandstones and conglomerates. The Usme Formation dates to the Neogene and Paleogene periods; Late Eocene to Early Oligocene epochs, and has a maximum thickness of 300 metres (980 ft).

Quick Facts Type, Underlies ...

Etymology

The formation was defined by Hubach in 1957 and named after the locality of Usme, Bogotá.[1]

Description

Lithologies

The Usme Formation is subdivided into a lower sequence of shales with intercalated sandstones and an upper part of sandstones and conglomerates.[1]

Stratigraphy and depositional environment

The Usme Formation unconformably overlies the Regadera Formation and is overlain by the Tilatá Formation.[2] The age has been estimated, based on palynological data, to be Late Eocene to Early Oligocene.[1] The depositional environment has been interpreted as marine with the upper part deposited in a deltaic setting.[3]

Outcrops

Usme Formation
Type locality of the Usme Formation to the south of the Bogotá savanna

The Usme Formation is found in its type locality in the synclinal of Usme, the valley of the Tunjuelo River.[1]

Regional correlations

More information Ma, Age ...
Legend
  • group
  • important formation
  • fossiliferous formation
  • minor formation
  • (age in Ma)
  • proximal Llanos (Medina)[note 1]
  • distal Llanos (Saltarin 1A well)[note 2]

See also

Geology of the Eastern Hills
Geology of the Ocetá Páramo
Geology of the Altiplano Cundiboyacense

Notes and references

Notes

  1. [N 1]
    based on Duarte et al. (2019)[40], García González et al. (2009),[41] and geological report of Villavicencio[42]
  2. [N 2]
    based on Duarte et al. (2019)[40] and the hydrocarbon potential evaluation performed by the UIS and ANH in 2009[43]

References

  1. [1]
    Montoya & Reyes, 2005, p.65
  2. [2]
    Guerrero Uscátegui, 1992, p.6
  3. [3]
    Bayona et al., 2010, p.7
  4. [4]
    García González et al., 2009, p.27
  5. [5]
    García González et al., 2009, p.50
  6. [6]
    García González et al., 2009, p.85
  7. [7]
    Barrero et al., 2007, p.60
  8. [8]
    Barrero et al., 2007, p.58
  9. [9]
    Plancha 111, 2001, p.29
  10. [10]
    Plancha 177, 2015, p.39
  11. [11]
    Plancha 111, 2001, p.26
  12. [12]
    Plancha 111, 2001, p.24
  13. [13]
    Plancha 111, 2001, p.23
  14. [14]
    Pulido & Gómez, 2001, p.32
  15. [15]
    Pulido & Gómez, 2001, p.30
  16. [16]
    Pulido & Gómez, 2001, pp.21-26
  17. [17]
    Pulido & Gómez, 2001, p.28
  18. [18]
    Correa Martínez et al., 2019, p.49
  19. [19]
    Plancha 303, 2002, p.27
  20. [20]
    Terraza et al., 2008, p.22
  21. [21]
    Plancha 229, 2015, pp.46-55
  22. [22]
    Plancha 303, 2002, p.26
  23. [23]
    Moreno Sánchez et al., 2009, p.53
  24. [24]
    Mantilla Figueroa et al., 2015, p.43
  25. [25]
    Manosalva Sánchez et al., 2017, p.84
  26. [26]
    Plancha 303, 2002, p.24
  27. [27]
    Mantilla Figueroa et al., 2015, p.42
  28. [28]
    Arango Mejía et al., 2012, p.25
  29. [29]
    Plancha 350, 2011, p.49
  30. [30]
    Pulido & Gómez, 2001, pp.17-21
  31. [31]
    Plancha 111, 2001, p.13
  32. [32]
    Plancha 303, 2002, p.23
  33. [33]
    Plancha 348, 2015, p.38
  34. [34]
    Planchas 367-414, 2003, p.35
  35. [35]
    Toro Toro et al., 2014, p.22
  36. [36]
    Plancha 303, 2002, p.21
  37. [37]
    Bonilla et al., 2016, p.19
  38. [38]
    Gómez Tapias et al., 2015, p.209
  39. [39]
    Bonilla et al., 2016, p.22
  40. [40]
    Duarte et al., 2019
  41. [41]
    García González et al., 2009
  42. [42]
    Pulido & Gómez, 2001
  43. [43]
    García González et al., 2009, p.60

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